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Messier M7 - Ptolemy's Cluster
M7, also known as the Ptolemy's Cluster, is located in the constellation Scorpius, and is best viewed during Mid-Summer.
Name:
Ptolemy's Cluster ...


M7 = NGC6475 (17h 53.9m -3449, 3.3 mag. )
M7 is visible with a naked eye on the backdrop of Milky Way about 430' NE of l Scorpii (see finder chart below). It contains 80 stars brighter then magnitude 10 and measures about 50' across.

M7 - Large, composed of approximately 50 bright stars. More condensed towards the center. It is visible with the naked eye.
Stock 1 - Near Albireo (Beta Cygni). Composed of 30 stars scattered in the field.
+ The Sky This Month + Sky Highlights ...

M7
(0.44)
TiI (see for instance the line at 5020) appears in late A-type stars and grows continuously toward later types. A positive luminosity effect exists. The most intense infrared line of TiI is that at 9638(32), which in the sun has W = 0.019.

M7 is 4 NNE of lambda Scorpii. It's about 800 light years away.
M80 (NGC 6093) is a rather faint, very compact, globular cluster in the vicinity of Antares, between this star and beta Scorpii, and more narrowly speaking, ...

M7
Is this page a copy of Strobel's Astronomy Notes? Author of original content: Nick Strobel ...

5 or M7 Ve). It has about 13 percent of Sol's mass (Torres et al, 1999), with about 14 percent of its diameter but only 8/100,000th of its luminosity. Some of the star's dimness is probably due to sunspots which often lead to stellar flaring.

Another galactic cluster to be found in the rich hunting grounds of the constellation of Scorpius is M7, also known as Ptolemy's cluster. It is a large group of about 80 stars set against the background of fainter and more distant Milky Way stars.

Mira A, a red giant belonging to the spectral type M7 IIIe, is an oscillating variable star that serves as a prototype for an entire class of variables, the Mira variables. There are between 6,000 and 7,000 known stars belonging to this group.

Open star clusters like M7 and the False Comet. Globular star clusters like M4 and M80. Not to mention the thick star clouds and dark nebulae of the Sagittarius Arm of the Milky Way. Truly spectacular. (If you're unfamiliar with this part of the sky, p.

Vladimir is a types of inhabited localities in Russia in Russia, located on the Klyazma River, to the east of Moscow along the M7 motorway . It is the administrative center of Vladimir Oblast....
in his favour.

Nebulae include Messier Objects M8, M16, M17, M20 and the Pipe Nebula. Open clusters include M6, M7, M18, M21, M23, M24, M25. Globular clusters include M9, M22, M28, M54, M69, ~0. And don't forget Baade's Window. Click on the photo to get the un-annotated version.

The comet is located in Ophiuchus, and about halfway between M7 ("stinger of the Scorpion" and planet Mercury. I just "MAY" have made a faint observation this morning in increasing twilight with my 10 x 90 Binocs and 11cm f5 Newtonian, but need to try again tomorrow morning, to actually confirm this! ...

There are many open clusters, including the spectacular M7 roughly 5 degrees off the tip of the scorpion's tail. As it is nearby, M4 is one of the largest, brightest globular clusters in the sky, visible even with binoculars. As a bonus, it is especially easy to find since it is located only 1.

M4 (globular cluster)
M6 The Butterfly Cluster (open cluster)
M7 Ptolemy's Cluster (open cluster)
M80 (globular cluster) ...

The Lagoon Nebula, M8, is just below center, while the open clusters M7 and M6 lie to the left of the Scorpion's lower tail. The center of the Galaxy lies down and to the right of M8. The bright "star" at lower left is Jupiter, as it appeared in mid-march of 2008.

See also: See also: What is the meaning of Star, Astro, Cluster, Sky, Scorpius?

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